Chapter 5: Electrons in Atoms

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Presentation transcript:

Chapter 5: Electrons in Atoms Section 3: Physics and the Quantum Mechanical Model

Light Quantum Mechanical Model- came from study of ______________. Sir Isaac Newton (1642-1727) – believed light consists of ______________. By 1900- evidence to show that light is made of _______________.

Light Wavelength:… Amplitude:… Symbolized by the greek letter __________. Wavelength has units of_________. Amplitude:…

Light Frequency: …. symbolized the greek letter ___________. Frequency has units of ______________. *For waves traveling at the same velocity, the longer the ______________, the smaller the _______________.

Light = c/λ or c = λ λ= v= c= (constant for the speed of light) *Note: the units for wavelength and the speed of light must be the same!!!

Light All electromagnetic radiation waves that travels at the same velocity:____________

Light Visible Spectrum Red – __________ wavelength Violet – __________ wavelength Order of Spectrum- ______________

Atomic Spectra Atoms gain energy… Atoms lose energy… The light emitted by an atom consists of only certain _____________, not all visible frequencies that __________ emits The ____________ of light emitted are different for each element; elements’ “_______________”.

Explanation of Atomic Spectra Ground State… As an electron absorbs energy… When the electron returns to its ground state…